Y-chromosome

In mammals, females are XX while males are XY so a woman should never be able to provide the necessary Y chromosome genes to produce a son.

Known as the centromere, the middle space between the two arms of the Y chromosome is key to its health.

The rapid decline of the Y chromosome seems to have ground to a halt at least tens of millions of years ago.

The sperm with the Y chromosome were leaner and faster and could swim down to the bottom of the tube more efficiently.

A core set of Y chromosome short tandem repeat (Y-STR) loci have been selected for use in human identification applications.

It is now clear that the Y chromosome is by far the most rapidly evolving part of the human and chimp genomes.

The Y chromosome has long been thought of as a stagnant part of the genome, where genes are slowly decaying in males of all species.

Over millions of years of evolution the Y chromosome, the biological keeper of all things male, has withered and shrunk.

There is already a precedent for this in nature, in the form of a Japanese spiny rat which has survived the loss of its Y chromosome.

This report mainly describe the SNPs and Y-chromosome SNPs characteristics and its potential applications to the forensic medicine.

Absence of a Y chromosome would probably mean the fetus is female, but could mean that fetal DNA was not found in that sample.

However, for the ultimate demise of the Y chromosome of the time the scientific community there are still enormous controversy.

The male-specific Y chromosome is a prime genetic suspect in AAA development, possibly acting as an independent risk factor.

The absence of the Y chromosome in the developing female fetus deposits the cells in a similar location and voila - the G-spot.

Many of the words they used were unfamiliar to me, and I figured I'd have to have a Y chromosome to really understand the excitement.

Objective: To investigate the presence of Y chromosome in hydatidiform mole (HM) and its genetic significance.

To establish the rate of mutation, the team examined an area of the Y chromosome.

Y chromosome analysis can also benefit missing persons investigations as it extends the range of potential reference samples.

The Y chromosome , the piece of DNA that makes men men, traces a purely paternal line of descent .

We have used Y-specific cosmid clones in a random fingerprinting approach to build contigs on the human Y chromosome.

New, still unpublished work reveals that the Neandertal Y chromosome differs from the human one.

CONCLUSION: Both of abnormal chromosome karyotype and Y-chromosome microdeletion are important to cause azoospermia and severe oligospermia.

The Y chromosome DNA testing enables examination of the male-specific portion of biological evidence.

But levels of the male Y chromosome strongly correlate with the presence of Polynesian languages.

Results Chromosomal aberrations were important causes of spontaneous abortion, es pe finally big Y-chromosome.

This demonstrates that the genes on a Y chromosome are essential for meiosis and sperm maturation.

But had she become pregnant spontaneously, her child could have inherited an intact Y chromosome.

This thinking led to fertility studies that focused on the Y chromosome and autosomes.

Objective To investigate the correlation between male infertility and Y chromosome microdeletions of azoospermia factor(AZF) regions.

Conclusion Y chromosome microdeletions are one of major causes of idiopathic and nonidopathic male infertility.

The major portion of the Y chromosome, the male specific region, is inherited intact from fathers to sons.

Heterogametic sex The sex with dissimilar sex chromosomes, one (in mammals the Y chromosome)being shorter than the other(the X chromosome).

The Y chromosome contains genes and gene families that play critical roles in the process of testis determination and differentiation.

Y-chromosome STR loci on origin of Chinese populations and their surnames in different locality.

Females carry two copies of the X chromosome while males carry one X and one Y chromosome.

The other is the Y-chromosome, present only in males, which is passed down with only minor mutations through the male line.

Gender is determined by the winning sperm's X or Y chromosome ( X means girl; Y means boy ).

Application of Y chromosome analyses in the family genealogy studies will be a most important part of historical anthropology researches.

Nature deals some unkind blows, but none is more hurtful to the pride of man than the looming demise of the Y chromosome.

In humans, a sperm cell contains either an X or Y chromosome, while an egg contains no Y chromosome.

That's because the male Y chromosome comes equipped with a so-called sex determination gene called SRY.

Haley Starshine: Or did the explosion actually blow away your Y-chromosome?

However, if a Y-chromosome is present , it stimulates the undifferentiated gonadal cell mass to develop into testicles .

A human sperm cell contains either an X or Y chromosome, while an egg only has a X chromosome.

While a male cell has an X chromosome from the mother and Y chromosome from the father.

The study matched the western European Y-chromosome lineage against thousands of people in France, Germany, Italy, and the United Kingdom.

If the Y chromosome is detected, the fetus is male.

Theother, the Y chromosome, passes directly from father to son.

Today, the Y chromosome holds fewer than 30 genes, against the X chromosome's 800 or so.

This is because there are two types of sperm produced in equal amounts; one carrying a X chromosome, and one carrying a Y chromosome.

Materials and methods for the separation of X- and Y-chromosome bearing sperm, for example in a semen sample, are provided.

At a genetics conference in Manchester last year, half of those attending thought the Y chromosome was bound for oblivion.

The Y chromosome makes its owner male because it carries the male-determining gene.

Then there is the Y-chromosome factor.

This is because the female sperm would lack the Y-chromosome needed for boys.

Using multiplex PCR to analyze the breakpoint of a severe Y-chromosome deletion

Genetic Polymorphisms of 6 Y-Chromosome Specific STR Loci in the southern Chinese Han Population and Its Application in Forensic Science

The Polymorphism Distribution of Y-chromosome Haplotypes in A Miao Population of Guizhou

Genomics of the human Y-chromosome association with male infertility

Genetic polymorphisms of 6 Y-chromosome specific STR loci in southern Han population of China and its application in paternity testing

Gene diagnoses of Y-chromosome AZF microdeletion in primary spermatogenesis impairment

Male Y chromosome extinction theory challenged By Neil Bowdler Science and health reporter, BBC News

Y-chromosome-specific microsatellite variation in Li ethnic groups of Hainan Island, China

Detection of Y-chromosome microdeletions and its research advances

Relationship between Y-chromosome microdeletions and male infertility

Principal Component Analysis of Y-chromosome Haplotype Distribution in 18 Ethnic Groups in Yunnan Province

Genetic polymorphism of Y-chromosome short tandem repeat in Elunchun ethnic group of China

Genetic polymorphism of Y-chromosome STR in Mongolia Ethnic Group of Baotou City

For example, genetic abnormalities in the Y chromosome have been linked to some cases of male infertility;